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Old 11-15-2011, 09:51 PM   #1
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recommended tire pressure?

Hi, what's the recommended tire pressure? On my way home from the dealership with my new ML350, the tire pressure warning light's up, saying the current tire pressure is 38psi. But it didn't say the recommended tire pressure. Checked the label beside the door, it only says the tire pressure for full load, 45psi for front and 48 for rear. This sounds too high. Then found another label in gas filler cap, which says 32 psi for both front and rear. Wrote to MB and dealer, both got ignored. So where can I find the recommended tire pressure? Thanks a lot.
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Old 11-15-2011, 10:29 PM   #2
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35psi and reset TPC
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Old 11-15-2011, 10:47 PM   #3
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Tire pressure

Quote:
Originally Posted by zwy_ok View Post
Hi, what's the recommended tire pressure? On my way home from the dealership with my new ML350, the tire pressure warning light's up, saying the current tire pressure is 38psi. But it didn't say the recommended tire pressure. Checked the label beside the door, it only says the tire pressure for full load, 45psi for front and 48 for rear. This sounds too high. Then found another label in gas filler cap, which says 32 psi for both front and rear. Wrote to MB and dealer, both got ignored. So where can I find the recommended tire pressure? Thanks a lot.
It really says 45/48? That is much too high. I don't have this vehicle yet, but it should be 32-35 front and 32-39 rear. Rear will vary more depending on loading. Can you post photos of the two labels?
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Old 11-16-2011, 09:27 AM   #4
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Yes, both the two labels only wrote 45/48 for full load, it didn't write anything for normal load, and it didn't emphasize 45/48 is for full load. So previously I thought it's for normal load (even though I was afraid it's too high), and inflate the tires to 45/48. The warning light did go out after that. Then I found it's too bumpy on the road and I am afraid of the high tire pressure. So I deflate it to 38. Lucky the warning light didn't come back anymore. I am surprised a luxury manufacturer as MB would miss the normal tire pressure information on the label. It did have another label inside the gas filler flap. But its user manual recommend people to look at the label beside the door. I am a little disappointed with MB, get even more disappointed when MB didn't reply my email.
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Old 11-16-2011, 11:36 AM   #5
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Quote:
Originally Posted by zwy_ok View Post
Yes, both the two labels only wrote 45/48 for full load, it didn't write anything for normal load, and it didn't emphasize 45/48 is for full load. So previously I thought it's for normal load (even though I was afraid it's too high), and inflate the tires to 45/48. The warning light did go out after that. Then I found it's too bumpy on the road and I am afraid of the high tire pressure. So I deflate it to 38. Lucky the warning light didn't come back anymore. I am surprised a luxury manufacturer as MB would miss the normal tire pressure information on the label. It did have another label inside the gas filler flap. But its user manual recommend people to look at the label beside the door. I am a little disappointed with MB, get even more disappointed when MB didn't reply my email.
Did you email via Owners Online? That usually gets fairly quick response.
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Old 11-16-2011, 07:00 PM   #6
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Update:
Today I went through 4 new ML 350 and found that the all the set pressures in the TPC control unit's were at 48psi-50psi. I corrected this by re-programming the control unit's, setting the pressure to 37-38psi and then test driving them.
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Old 11-16-2011, 07:40 PM   #7
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Quote:
Originally Posted by redcoupe View Post
Update:
Today I went through 4 new ML 350 and found that the all the set pressures in the TPC control unit's were at 48psi-50psi. I corrected this by re-programming the control unit's, setting the pressure to 37-38psi and then test driving them.
Can you notify MBUSA about this?
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Old 11-16-2011, 08:49 PM   #8
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I usually go with the pressures in the fuel filler lid. That has worked fine for me for several MB's. And yes, reset the TPMS.
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Old 11-16-2011, 09:30 PM   #9
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I usually go with the pressures in the fuel filler lid. That has worked fine for me for several MB's. And yes, reset the TPMS.
Please explain how to reset TPMS, thank you. ML 350, 2011
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Old 11-16-2011, 09:44 PM   #10
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Fuel filler lid sticker is wrong. The tires for 2012 require tire pressure as designated on door pillar. I brought this to the attention of my dealer and they contacted MBUSA to confirm.
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Old 11-16-2011, 10:32 PM   #11
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Originally Posted by hiend View Post
Please explain how to reset TPMS, thank you. ML 350, 2011
Don't you have a manual?
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Old 11-17-2011, 08:34 AM   #12
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Originally Posted by GregW / Oregon View Post
Don't you have a manual?
I HAVE EVER QUOTED you?
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Old 11-17-2011, 10:25 AM   #13
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Originally Posted by GreginNH View Post
Fuel filler lid sticker is wrong. The tires for 2012 require tire pressure as designated on door pillar. I brought this to the attention of my dealer and they contacted MBUSA to confirm.
But if we stick to the tire pressure on the door pillar, the ride feels quite bumpy. Also, I noticed the max allowed tire pressure printed on the tire is around 53 psi. That concerned me if the code tire is inflated to 45/48 psi, thinking that pressure will increase after you run a while on highway.
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Old 11-17-2011, 10:54 AM   #14
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Tire pressures

Quote:
Originally Posted by zwy_ok View Post
But if we stick to the tire pressure on the door pillar, the ride feels quite bumpy. Also, I noticed the max allowed tire pressure printed on the tire is around 53 psi. That concerned me if the code tire is inflated to 45/48 psi, thinking that pressure will increase after you run a while on highway.
If memory serves me right, my W164 with 19" tires takes 32F/35R with low load and 32/39 loaded. No reason the W166 should be much different. The maximum tire pressure is a cold rating, not taking into account the increase while running.
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Old 11-17-2011, 11:01 AM   #15
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TPMS reset

Quote:
Originally Posted by hiend View Post
I HAVE EVER QUOTED you?
Not sure what you're trying to say, but here is the relevant page:
Attached Files
File Type: pdf Pages from 2012 Owner's Manual.pdf (86.7 KB, 2155 views)
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Old 11-17-2011, 11:28 AM   #16
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Quote:
Originally Posted by GregW / Oregon View Post
Not sure what you're trying to say, but here is the relevant page:
Thank you, same instruction for ML 2011?
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Old 11-17-2011, 12:15 PM   #17
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TPMS reset 2011

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Originally Posted by hiend View Post
Thank you, same instruction for ML 2011?
Sorry, Page 333 here: http://www.mbusa.com/vcm/MB/DigitalA...al/2011_ml.pdf
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Old 11-20-2011, 07:26 PM   #18
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Quote:
Originally Posted by GregW / Oregon View Post
Not sure what you're trying to say, but here is the relevant page:
http://mbworld.org/forums/attachment...ers-manual.pdf


This page refers to:
"Before restarting, consult the Tire and
Loading Information placard on the

B-pillar on the driver's side or the tire
pressure table on the inside of the fuel filler
flap to ensure the tire pressure in all four
tires is set correctly for the current operating conditions."


Dealer says Pillar Post. What gives. Which is it?
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Old 11-20-2011, 07:51 PM   #19
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Tire pressures

Quote:
Originally Posted by wheels777 View Post
http://mbworld.org/forums/attachment...ers-manual.pdf


This page refers to:
"Before restarting, consult the Tire and
Loading Information placard on the

B-pillar on the driver's side or the tire
pressure table on the inside of the fuel filler
flap to ensure the tire pressure in all four
tires is set correctly for the current operating conditions."


Dealer says Pillar Post. What gives. Which is it?
They should be the consistent. This is from my 2006 with 19s:

B pillar: 32 F / 39 R
Filler cap: Partially loaded 32 F / 32 R; Fully-loaded 32 F / 39 R

Add ~4 lb for warm tires.

I would be willing to bet the correct values for the 2012 are virtually identical to these.

Last edited by GregW / Oregon; 11-20-2011 at 10:22 PM.
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Old 11-20-2011, 08:04 PM   #20
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Quote:
Originally Posted by GregW / Oregon View Post
They should be the consistent. This is from my 2006 with 19s:

B pillar: 32 F / 39 R
Filler cap: Partially loaded 32 F / 32 R; Fully-loaded 32 F / 39 R

I would be willing to bet the correct values for the 2012 are virtually identical to these.

Thanks Greg, Always helpful.

Mine was delivered to me with about 35lbs when it was 70 degrees. A week or so later as the temp dropped outside the Tire pressure warning came on. Drove tot the dealer and they went by the B Pillar Post. So their prep dept. and Service Advisor are not on the same page. It's my guess that if I called MB and spoke to 2 different reps that they would not know which was correct.

Ya have to admit this a bit absurd due to the wide variation from the labels.

I think I'll check with the tire manufacturer , Continental.

I notice when they have the higher pressures the tires just about "Ping" going over some bumps.
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Old 11-23-2011, 01:21 AM   #21
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On newer cars, the recommended pressure is most commonly listed on a sticker inside the driver’s door. If there’s no sticker on the door, you can usually find the specs in the owner’s manual. Most passenger cars will recommend 32 to 35 psi in the tires when they’re cold.
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Old 12-05-2011, 03:13 PM   #22
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The Plot Thickens

So I called MB headquaters myself since I was having doubts as to the credibility of "service advisor". Apparently, the B Pillar ratings are for Maximum Load (even though it is not clearly stated) and that it is perfectly safe to run the tires at the lower range as referenced on the fuel door.
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Old 12-05-2011, 03:24 PM   #23
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Quote:
Originally Posted by zwy_ok View Post
Hi, what's the recommended tire pressure? On my way home from the dealership with my new ML350, the tire pressure warning light's up, saying the current tire pressure is 38psi. But it didn't say the recommended tire pressure. Checked the label beside the door, it only says the tire pressure for full load, 45psi for front and 48 for rear. This sounds too high. Then found another label in gas filler cap, which says 32 psi for both front and rear. Wrote to MB and dealer, both got ignored. So where can I find the recommended tire pressure? Thanks a lot.
What did the fuel filler door say?
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Old 12-05-2011, 04:09 PM   #24
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Originally Posted by MBNA109 View Post
What did the fuel filler door say?
Post #4.
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Old 12-05-2011, 04:42 PM   #25
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Quote:
Originally Posted by GregW / Oregon View Post
Post #4.
Greg in my GLK, I went through this also - I have 2 labels in the door jams. I was thinking the OP was not clear in what he was looking at & his tone in the below quote he implies THREE labels & he was only looking @ the door jams.

Quote:
Originally Posted by zwy_ok View Post
Yes, both the two labels only wrote 45/48 for full load, it didn't write anything for normal load, and it didn't emphasize 45/48 is for full load. So previously I thought it's for normal load (even though I was afraid it's too high), and inflate the tires to 45/48. The warning light did go out after that. Then I found it's too bumpy on the road and I am afraid of the high tire pressure. So I deflate it to 38. Lucky the warning light didn't come back anymore. I am surprised a luxury manufacturer as MB would miss the normal tire pressure information on the label. It did have another label inside the gas filler flap. But its user manual recommend people to look at the label beside the door. I am a little disappointed with MB, get even more disappointed when MB didn't reply my email.
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